Log Message:
Update from 4.5.3 to 4.5.4.

Team cannons could kill teammates with laser pulses.  Fixed.

On the map Death Star one can destroy a large number of targets with
one FNC.  This results in packet buffer overflows and slow updates.
To overcome this a smarter map update algorithm is implemented in the
server and also map updates are now limited to max 2 KB per network packet.

The default score font was reduced from 15 to 13.

When the server sends map updates to the client these are now always
acknowledged immediately by the client.  This should help prevent stalls
or lock-ups on maps where are a large number of targets or cannons
can be destroyed.  It should also reduce the number of very big
server frame update packets.

Robots no longer try to go after players who aren't in playing mode.

[Windows-specific stuff elided.]